Calculation And Deformation Analysis Of The Concrete Fabricated Hollow-ribbed Floor

The concrete fabricated hollow-ribbed floor is a new floor system. It is composed ofcast-in-site ribs and the prefabricated concrete box fillers. It is better than one-way slab andtwo-way slab with the advantages of large rigidity, lightness, high porosity, tall net floor,standardization and industrialization. It has been widely applied and popularize in some areain China.Considering the materials of concrete and the transforms shape is nonlinear whichmake it more complicate to calculation and deformation Analysis the waffle structure. Atpresent, the elastic flexure theory was usually adopted when calculation and deformationAnalysis the waffle structure，with the nonlinear property almost ignoring, these result in thehuge difference between calculation results and physical circumstances.The parameters such as concrete strength, reinforced ratio, beam height，the thickness ofthe lower and so on that affect the deflection are analyzed. The formula of deflection of theConcrete Fabricated Hollow-ribbed Floor is deduced in this thesis as the main job. In order tosimplify the calculation, I did such suppose as follows：Change the I shape waffle slab forminto rectangle shape of waffle slab; with the help of principle of virtual work, the expressionof the displacement function is obtained. Then, on the basis M folded-line, the rigidityof rectangle-crossed beam is deduced, and the expression of the rigidity of beam which issubjected different loads is got; secondly, through the displacement function, the relationsbetween beams in it is obtained, so the rigidity of each beam in frame structure is obtained.The last Compared with the experiment data, the formula result and ansys is matched tothe experiment data to contrast. Although there are some error calculation results and actualsituation, but the error in the controllable range, meet the project requirement.